To check the wear of the final drive, visually check the pinion (14) and sprocket (17). If the teeth are found to worn as shown in the figure (dotted line), the sprocket must be renewed.


To check the amount of wear on the chain (8), keep the chain taut and measure 16 links.
If the length (l) is greater than 256.5 Mm, the chain should be replaced.
Important
The sprocket (17), engine pinion (14) and chain (8) must all be replaced together as a set.

Final drive
Removing of the front sprocketRemoval of the steering head components
Note
All parts fitted to the top and bottom yokes, including the wiring and
control cables, can remain on the motorcycle
provided they do not hinder the following operations.
Loosen the screws (19) securing the supports (21) and (23) of splashguard
(22) to the air conveyors (t).
...
Refitting the brake disks
Before refitting the brake disc to the wheel, clean all contact surfaces
thoroughly and smear a medium strength
threadlocker on the threads of retaining screws (5).
Operating on the left side, fit the phonic wheel (6).
Tighten the fixing screws (5) of the brake disk (7) to the wheel followi ...
Adjusting the chain tension
Make the rear wheel turn until you find the position where chain is tightest.
Set the vehicle on the side stand. Push down
the chain at the point of measurement and release. Measure the distance between
the "aperture" upper profile and pin
centre.
The read distance must be: 9 to 11 mm.
...